AT an office party in 2005, one of my colleagues asked my then husband what I did on weekends. She knew me as someone with great intensity and energy. “Does she kayak, go rock climbing and then run a half marathon?” she joked. No, he answered simply, “she sleeps.” And that was true. When I wasn’t catching up on work, I spent my weekends recharging my batteries for the coming week. Work always came first, before my family, friends and marriage — which ended just a few years later.

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In recent weeks I have been following with interest the escalating debate about work-life balance and the varying positions of Facebook’s Sheryl Sandberg, Marissa Mayer of Yahoo and the academic Anne-Marie Slaughter, among others. Since I resigned my position as chief financial officer of Lehman Brothers in 2008, amid mounting chaos and a cloud of public humiliation only months before the company went bankrupt, I have had ample time to reflect on the decisions I made in balancing (or failing to balance) my job with the rest of my life. The fact that I call it “the rest of my life” gives you an indication where work stood in the pecking order.

I don’t have children, so it might seem that my story lacks relevance to the work-life balance debate. Like everyone, though, I did have relationships — a spouse, friends and family — and none of them got the best version of me. They got what was left over.

I didn’t start out with the goal of devoting all of myself to my job. It crept in over time. Each year that went by, slight modifications became the new normal. First I spent a half-hour on Sunday organizing my e-mail, to-do list and calendar to make Monday morning easier. Then I was working a few hours on Sunday, then all day. My boundaries slipped away until work was all that was left.

Inevitably, when I left my job, it devastated me. I couldn’t just rally and move on. I did not know how to value who I was versus what I did. What I did was who I was.

I have spent several years now living a different version of my life, where I try to apply my energy to my new husband, Anthony, and the people whom I love and care about. But I can’t make up for lost time. Most important, although I now have stepchildren, I missed having a child of my own. I am 47 years old, and Anthony and I have been trying in vitro fertilization for several years. We are still hoping.

Sometimes young women tell me they admire what I’ve done. As they see it, I worked hard for 20 years and can now spend the next 20 focused on other things. But that is not balance. I do not wish that for anyone. Even at the best times in my career, I was never deluded into thinking I had achieved any sort of rational allocation between my life at work and my life outside.

I have often wondered whether I would have been asked to be C.F.O. if I had not worked the way that I did. Until recently, I thought my singular focus on my career was the most powerful ingredient in my success. But I am beginning to realize that I sold myself short. I was talented, intelligent and energetic. It didn’t have to be so extreme. Besides, there were diminishing returns to that kind of labor.

I didn’t have to be on my BlackBerry from my first moment in the morning to my last moment at night. I didn’t have to eat the majority of my meals at my desk. I didn’t have to fly overnight to a meeting in Europe on my birthday. I now believe that I could have made it to a similar place with at least some better version of a personal life. Not without sacrifice — I don’t think I could have “had it all” — but with somewhat more harmony.

I have also wondered where I would be today if Lehman Brothers hadn’t collapsed. In 2007, I did start to have my doubts about the way I was living my life. Or not really living it. But I felt locked in to my career. I had just been asked to be C.F.O. I had a responsibility. Without the crisis, I may never have been strong enough to step away. Perhaps I needed what felt at the time like some of the worst experiences in my life to come to a place where I could be grateful for the life I had. I had to learn to begin to appreciate what was left.

At the end of the day, that is the best guidance I can give. Whatever valuable advice I have about managing a career, I am only now learning how to manage a life.

Autor: Erin Callan, New York Times, March 9, 2013

Erin Callan is the former chief financial officer of Lehman Brothers.